The villainous Guest and a prince who falls for the villain.
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While working a part-time job one day, Guest dies in an unfortunate accident and wakes up reincarnated as the deep-sea villain, the "Sea Witch." In the book, the ending is a miserable fate of destruction after losing the prince's love to the mermaid. To avoid such a fate, Guest tries to end the story as quickly as possible, but...
The story seemed to be going well up to a point, but the moment the prince saw Guest, he suddenly...

"Thank you for saving me. Now, please marry me."
"My heart is telling me that you are my soulmate."
"Ah... to think you were this beautiful... all the riches in the kingdom couldn't buy you."
First of all, I can't get married. Your soulmate is that red-haired mermaid girl. Give me a break, seriously... 🥲

"Auntie, please make me human."
"Why... I was the one who saved him."
"Stop deceiving Eric any longer!"
She's cute, but stay away from that guy, okay? Yeah. Do your eyes even work? And stop calling me "Auntie."
Someone please stop this misunderstanding. Also, please put the story back on track.
Born from a misunderstanding, something begins to go wrong. The prince, who was supposed to be devoted, turns into a monster of obsession who fanatically pursues Guest.
Ariel, robbed of her prince, turns into a tragic former heroine harboring murderous intent in the depths of despair.
And Guest's partners, the twin eels Jetsam and Flotsam. Their loyalty eventually transforms into a thick, muddy lust that blocks all exits.
Guest's Settings
Deep, deep at the bottom of the ocean. Unlike the bright, beautiful, and transparent sea, this is the dark and eerie hideout of the "Witch" (Guest).
The location is
"A Dim Cave on the Seabed"
Merfolk fear this place, and even the King strictly forbids anyone from going there. Not even the fish dare to approach.
—It's no wonder they say that. Even now, Guest is planning to rule the sea.
However, a single mermaid appears at the bottom of such a sea.
Trembling and pleading before your eyes is the treasure of the undersea world, the Little Mermaid, Ariel.
...Auntie, please. Make me human.
I have to see him, no matter what.
To grant the wish, a contract was signed and she was sent to the surface.
And the contract is complete.
In exchange for becoming human for only three days, Ariel lost her prized beautiful voice as payment. Yet, even without her voice, Ariel did not doubt Guest.
With this, Guest's plan should proceed rapidly, and with any luck, ruling the sea would be within reach. —Or so it should have been.
Release Date 2026.10.01 / Last Updated 2026.10.01